Table 2.
Descriptive statistics and quantiles of birthweight by socio-demographic characteristics of women in MACE birth cohort
| Variable | N (%) | P5 | P10 | P25(Q1) | Median | P75(Q3) | P90 | P95 |
|---|---|---|---|---|---|---|---|---|
| Marital status | ||||||||
| Married | 93 (13.6) | 2084 | 2400 | 2900 | 3300 | 3560 | 3990 | 4031 |
| Living together | 39 (5.7) | 2080 | 2400 | 2800 | 3112 | 3430 | 3800 | 3970 |
| Single | 554 (80.8) | 2090 | 2400 | 2840 | 3115 | 3400 | 3720 | 3980 |
| Maternal age | ||||||||
| Teenage (less than 25 yrs) | 116 (16.9) | 2070 | 2331 | 2740 | 3060 | 3300 | 3560 | 3640 |
| Prime of fertility (25–29 yrs) | 416 (60.6) | 2100 | 2440 | 2876 | 3160 | 3430 | 3800 | 4000 |
| Adult age (30 years and above) | 155 (22.6) | 2031 | 2340 | 2800 | 3170 | 3400 | 3800 | 4000 |
| Maternal education | ||||||||
| Primary or less | 16 (2.3) | 1570 | 1800 | 2775 | 3210 | 3495 | 3870 | 4260 |
| Secondary school | 546 (79.5) | 2083 | 2400 | 2815 | 3105 | 3400 | 3710 | 3920 |
| College or university | 125 (18.2) | 2096 | 2410 | 2960 | 3210 | 3480 | 3970 | 4120 |
| Employment | ||||||||
| Employed | 127 (18.5) | 2080 | 2360 | 2820 | 3100 | 3480 | 3850 | 4010 |
| Unemployed | 560 (81.5) | 2090 | 2400 | 2860 | 3140 | 3400 | 3730 | 4000 |
| Maternal annual income | ||||||||
| No personal income | 329 (47.9) | 2090 | 2400 | 2885 | 3160 | 3400 | 3800 | 4000 |
| Less than R30000 | 276 (40.2) | 2090 | 2400 | 2800 | 3100 | 3400 | 3700 | 3980 |
| R30000 and above | 82 (11.9) | 2083 | 2530 | 2840 | 3150 | 3480 | 3800 | 3970 |
| Parity | ||||||||
| Nulliparous | 334 (48.8) | 2080 | 2360 | 2790 | 3100 | 3340 | 3630 | 3850 |
| Primaparous | 220 (32.1) | 2079 | 2060 | 2870 | 3230 | 3500 | 3895 | 4045.5 |
| Multiparous | 131 (19.1) | 2280 | 2500 | 2900 | 3150 | 3410 | 3800 | 3990 |
| Infant Gender | ||||||||
| Male | 359 (52.3) | 2084 | 2370 | 2860 | 3170 | 3450 | 3900 | 4060 |
| Female | 328 (47.7) | 2090 | 2410 | 2830 | 3125 | 3370 | 3600 | 3810 |